Noritz ecoTOUGH NRC98-DV-NG Installation Manual page 21

Gas Line Sizing for a Noritz Condensing Tankless Gas Water Heater
Maximum Natural Gas Delivery Capacity in Cubic Feet per Hour (0.60 Specific Gravity, 0.5" WC Pressure Drop)
Pipe
10' (3m) 20' (6m) 30' (9m) 40' (12m) 50' (15m) 60' (18m) 70' (21m) 80' (24m) 90' (27m) 100' (30m) 125' (37.5m)
Size
1/2" 174
119
3/4" 363 249
1" 684 470
1 1/4" 1404 965
1 1/2" 2103 1445
2" 4050 2784
2 1/2" 4437
6455
3"
11,412 7843
3 1/2" 16,709 11,484
4"
23,277 15,998
Contact the Gas Supplier for Btu/Cubic Ft. of the Supplied Gas. 1000 BTU/Cubic Ft. is a Typical Value
Maximum Liquefied Petroleum (Undiluted) Delivery Capacity in Thousands of Btuh (0.5" WC Pressure Drop)
Pipe
Size 10' (3m) 20' (6m) 30' (9m) 40' (12m) 50' (15m) 60' (18m) 70' (21m) 80' (24m) 90' (27m) 100' (30m)
1/2"
275 189
3/4"
567 393
1071
1" 732
1 1/4" 2205 1496
1 1/2" 3307 2299
2"
6221 4331
** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
Maximum Capacity of Flex TracPipe in Cubic Feet per Hour of Natural Gas
Pipe
Size 10' (3m) 20' (6m) 30' (9m) 40' (12m) 50' (15m) 60' (18m) 70' (21m) 80' (24m) 90' (27m) 100' (30m) 150' (45m) 200' (60m)
206 147
3/4"
1" 383 269
1 1/4" 614 418
1 1/2"
1261 888
2" 2934 2078
Maximum Capacity of Flex TracPipe in Thousands of Btuh Liquefied Petroleum
Pipe
Size 10' (3m) 20' (6m) 30' (9m) 40' (12m) 50' (15m) 60' (18m) 70' (21m) 80' (24m) 90' (27m) 100' (30m) 150' (45m) 200' (60m)
325 232
3/4"
1" 605 425
1 1/4" 971 661
1 1/2"
1993 1404
2" 4638 3285
** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
TracPipe® is a registered trademark of Omega Flex.
Maximum Capacity for Gas Flex Connectors in Cubic Feet per Hour of Natural Gas
Pipe
Size
12" (300mm)
180
1/2"
3/4"
1"
1 1/4"
Maximum Capacity for Gas Flex Connectors in Thousands of Btuh Liquefied Petroleum
Pipe
Size 12" (300mm)
288
1/2"
3/4"
1"
1 1/4"
** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
Adapted from UPC 1997
96 82 73
200 171 152
377 323 286
775 663 588
993 880
1161
1913 1696
2235
3049 2703
3563
6299 5391 4778
9222 7893 6995
12,847 10,995 9745
Length in Feet
152 129 114 103
267 237 217
315
590 504 448 409
1212 1039 913 834
1858 1559 1417 1275
3465 2992 2646 2394
R
Length in Feet
121 105 94
218 188 168
334 284 251
723 625 559
1698 1472 1317
R
Length in Feet
191 166 149
344 297 265
528 449 397
1143 988 884
2684 2327 2082
24" (600mm) 36" (900mm)
150 125
290 255
581 512
1470 1200
24" (600mm) 36" (900mm)
240 200
465 409
825
930
2352 1920
Length in Feet
66 61 56
138 127 118
259 239 222
532 490 456
798 734
683
1536 1413 1315
2449
2253 2096
4329 3983 3705
6338 5831 5425
8830 8123 7557
96 89 83
196 185 173
378 346 322
771 724
677
1086
1181 1023
2205 2047 1921 1811
86 80 75 71
153 141 132 125
227 209 194
181
509 471 440 415
1203 1114 1042 983
136 126 118 112
241 222 208 197
359 330 307
286
805 745 696 656
1902 1761 1647 1554
Length in Inches
48" (1200mm) 60" (1500mm)
106
215
442
1130
Length in Inches
48" (1200mm) 60" (1500mm)
169
344
708
1808
53 50 44
111 104 93
208 197 174
428 404 358
641 605 536
1234 1165 1033
1646
1966 1857
3476 3284 2910
5090 4808 4261
7091 6698 5936
125' (37.5m) 150' (45m) 200' (60m)
78 69 63 55
162 132 112
146
307 275 252 213
630 567 511 440
866 675
976 787
1496
1606 1260
(0.60 Specific Gravity, 0.5" WC Pressure Drop)
67 55 48
118 94 82
171 137 116
393 320 277
933 762 661
( 0.5" WC Pressure Drop)
106 87 76
186 143 129
270 217 183
621 506 438
1475 1205 1045
(0.60 Specific Gravity, 0.5" WC Pressure Drop)
72" (1800mm)
93 86
197 173
397 347
960 930
( 0.5" WC Pressure Drop)
72" (1800mm)
149 137
315 278
638 556
1536 1488
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